Other Income (Expense) (Details) - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2017	Oct. 01, 2016
Schedule of Equity Method Investments [Line Items]
Loss on disposal of equity affiliate	$ 7,060	$ 0
Amounts reclassified out of AOCI, net of tax	4,843
Equity affiliate [Member]
Schedule of Equity Method Investments [Line Items]
Amounts reclassified out of AOCI, net of tax	$ 1,110

Amount after tax of reclassification adjustments of other comprehensive income (loss).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14A
-URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 55
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=84158357&loc=d3e1436-108581

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